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Transcript
Organic Light-Emitting Diodes By: Grant Warfield What is an OLED? ● ● An OLED is an electronic device made by placing a series of organic thin films between two conductors. When electrical current is applied, a bright light is emitted. A device that is 100 to 500 nanometers thick or about 200 times smaller than a human hair. The OLED Structure How OLEDs Emit Light ● ● ● ● The battery or power supply of the device containing the OLED applies a voltage across the OLED. An electrical current flows from the cathode to the anode through the organic layers. (an electrical current is a flow of electrons) At the boundary between the emissive and the conductive layers, electrons find electron holes. The OLED emits light. Types of OLEDs ● Passive-matrix ● Active-matrix ● Transparent ● Top-emitting ● Flexible ● White Passive-Matrix Active-Matrix Transparent Top-Emitting Flexible White Advantages ● Thinner, lighter and more flexible ● Brighter ● Consume much less power ● Easier to produce and make into larger sizes ● Large field of view Disadvantages ● Lifetime ● Manufacturing ● Water Current OLEDs Future of OLEDs?
